Swing-motion truck.



No. 849,193. PATENTED APR. 2, 1907 W. P. BETTENDORF.

SWING MOTION TRUCK.

APPLICATION FILED MAR. 25, 1904 2 SHEETS-SHEET l.

Nov 849,193.

PATENTED APR. 2, 1907. W. P. BETTBNDORF.

SWING MOTION TRUCK.

APPLICATION FILED MAR.25,1904.

2 SHEETS-SHEET 2,

llllllII WILLIAM P. BETTENDORF, or DAVENPORT, IOWA.

SWlNG-NIOTION TRUCK.

, Specification of Letters Patent.

Patented April 2, 1907.

Application filed March 25, 1904. Serial No. 200,000.

To all whom it may concern: i

' Be it known that I, WILLIAM P'. BETTEN- DORF, a citizen of the'United States, and a resident of Davenport, in the county of Scott and State of Iowa, have invented certain new and useful Improvements in Swing-Motion Trucks, of which the following is a full, clear,

and'ez ract description.

Hretofore .the endsof the bolsters of swing-motion trucks were suspended from the transom at points between the side frames thereof,- and the conseguence of this construction was to lace the weight upon the 'up'per arches of t e sideframes and create a tendency in the latter to tilt inward.

My invention has for its object the distribution'of the weight of the swing-bolster and its load equally upon each side of the side frames and the transferring of the point of suspension of the bolsterfrom the transom to said side frames by novel means that cause the-bolster to rise during its sidewise movement in either direction always in a plane parallel to the ball of the rails without disturbing'the center of gravity of the carbody and .so that the repressive effect of the entire weight of the load will be felt equally throughout the length of the bolster during the displacement thereof from its normal po- I larly pointed out in the claims.

i thereof.

sition and automatically restore the same to its position of rest moreeffectually than is possible where during its side movementlthe bolster tilts and disturbs the'center of gravity of the car-body and feels the repressive effect-of the weight of the load mostly on the lowermost end thereof, where it. is least needed This I accomplish by the means hereinafter fully described and as In the drawings, Figure 1 is a la'n view of my invention. Fig. 2 is a side elevation Fig. 3 is a transverse vertical central section of the same. Fig. 4 is a detail view showing the three-point hanger. in perspective. r

Referring to the drawings, A represents the side frames of my improved car-truck, which preferably consists of anu'ppe r arch, a lower arch, and two centrally-disposed columriguides, all cast in onepiece. Just above the central opening a of these side frames theupper arch has projecting laterally therefrom corresponding longitudinallyrdisposed open bearings 12 b for the upper parallel horizontal portions of journals'cr of a double link C. This link consists of a continuous loop of bar particumetal, which midway its lengthis bent back over itself, so that the ends (constituting the said journals 0) are brought near together, and the bends form loops d dyin which are seated-the ends of the pivot-bar D,.from which the platform E, supporting the bolstersprings ee, is suspended. Y

C is shown in perspective in 'Fig. 4 of the drawings, and its proportions and dimen sions are suclrthat when one of the journals c thereof rests in one bearing 1) of the side frame and the other journal 0 thereof rests in the bearing 11 on the other side of the side frame the vertical plane striking through the axis of pivot bar I) would come midway between the sides of the side frames intermediate said journals. Bar D passes through and has journaled thereon between said loops (1 the bail f, projecting centrally and vertically up from the platform E and the latter is so constructed that it extends equally on "both sides of the side frame, and it"is provided with seats g g for the centers ofthe elliptical springs e e, that are arranged par allel to and at an equal distance from the transverse center of the side frame. These elliptical springs 6 support the ends of the bolster .G substantially as shown and are preferred especially for passenger-car trucks. Coil-springs or other forms of springs might be substituted in their place, however. In the drawings bolster G is shown as being made of cast-iron and as. having a truss shape between the inside springs, with solid ends extending out through the center openin ofthe side frames. .These ends are provi ed on either side of the side frames with stop-lugs h h, located atsuch distance apart as to permit the bolster to have a limited lon- "e'ment-in either direction-bein contact withathe outer edges of theopen bearings b b.

H The sills of the central opening a of the side frames are preferably flanged laterally and provided with a longitudinal groove therein which forms a seat j for the transverse tenon 7c, projecting down from the ends of the spring-plank 7c and produced by making a transverse depression in the upper surface of said plank, substantially as shown. These transversedepressions thus made form sockets for the shanks of transverse stop-bars I, that project up under the center of the platform E between lugs 22 e, depending from the under side of said platform. The

distance between the sides 'of bars I and said lugs 6 when the bolster isin its normal position corresponds to the distance between the stop-lugs projecting, from the top of the ends of the bolster and the outer edges of'theopen bearings bof the side frame and assist in limiting the swing motion of the bolster. Besides the connection supplied by the spring-plank I prefer to connect said side frames at suitable o'ints between the bolster and the journa -boxes by transoms J J. The ends of these 'transoms are provided with circular 'trunnions m m, from. the ends of which lugs m project diametrically opposite pins m therethrough. When'the ends of the transom are inserted in place in these openings in the side frames, theflat sides of the i their flat sides are in ahorizontal each'other. iThese trunnions are adapted to::

be extended through circular openings 0 in the upper arch of the side frame between the column-guides and the I journal-boxes that have diametrically'opposite grooves or offsets therein which permit the passage of the transom are-in avertical plane, when they are properly assembled with relation to said side frames and the said 'transoms and moved with said ,trunnions as pivots until I ositio'n, whereupon pins m are inserted in p ace and 1 the trunnionscannot bewithdrawn. The

ends of the transom's are provided with lateral projections K, which extend toward the journal-boxes, and when'said transom's are properly secured to the side frame these extensions K lie up underneath the inside flange of the upper edge of the side frames. The extremities of these projections K are provided with studs '11, that extend up through suitable openings'in said flanges and .are retained therein by cotters inserted through openings in their ends .or in any other suitable mannein; l

-I prefer to use my invention in; conjunction with side frames having integral journal-boxes O O at their ends, substantailly as shown in Letters; Patent of the United" States granted to me October 6, 1903, No. 740,617, or any modification of the same. This feature, however, is notess'ential, although Iprefer their use.

. I do not desire to be confined to the exact construction of all of the elements and parts of'my invention'as hereinbefore set forth, as it is obvious they can be modified and changed without departing from the spirit of my invention, as indicated in the statement contained in the first part of this specification. All such changes, therefore, or modifications I desire to be understood as contem lating within the scope of my invention.

hat I claim as new is 1. In a car-truck, the combination with the side frames having bolster-o enings therein, of a spring-motion bolster t e-ends of which extend through said openings, and

links j ou-rnaled in said bearings and having their. pendent portions suspend said bolster at a point in the transverse verticalpla ie? I mediate said bearings;

3. In a car-truok, the combination'witlirittw the side frames 7 having bolster-openings therein,"a1id having bearings 'one'a'ch side of i the upper arch'of said side fra'ine above said opening, of a-swing motion bolster the ends of which extend through said opening, and" an oblong link consisting of an endless bar'of; metal bent at its center of length backupon "itself and having its adj acent'endsjournaled in said bearings, and its central return-bends sustaining said bolster. I

4. Ina cartru'c,k,,the combinationwiththe side frames having-bolster openings therein, of a swing-motion bolster the ends of which extend through said openings, spring-seats", springs thereon for supportng, said bolster, and devices for sustaining said bolster having three pivot-centers two of which are in con- I nection with said side frames and one with said s riiig seats.

5. n a car-truck, the combination with I the side frames having bolsteropenings therein, and having bearings on each side 0 the upper'arch of said side frame above said opening, of a swing-motion bolster the ends, 0

which extend through said opening, my

spring-seats springs thereon for supporting;v said bolsterjand an oblong link consisting of an endless bar of metal bent at its centerof length back upon itself and having its adj acent ends journaled in said bearings,and its no central return-bends sustaining said springseats.

- 6. In acar-truck, the combination with rthe side 'frames having bolster-openings therein, and having bearings on each side of; n5 the-upper arch of said side frame above said opening, of a spring-motion-bolster the ends:

0 which extend through said opening, springseats extending laterally to each side of said side frames and having an upWardly-project- 1 2o ing bail midway between said lateral extensions, and springs seated on each of said extensions for supporting said bolster, andan oblong link consisting of an endless barTof metal bent at its center of length back upon itself I25,

and having its adjacent ends journaled in said bearings, and its .central returnbend s connected to said bail.

7. In a cartruck, the combination with- Y Y the side frames having bolster openings. r 0

side frames and one with j,

therein, and having bearings on each side of the upper arch ofsaid side frameabove said openin of a swing-motion bolsterthe cnds whic extend throughsaid openin' springseats extendin laterallyto'each'sife of said side frames an having an upwardly: rojecting bail midway between said latera extensions, and springs seated on each of said-;ex-. tensions for supporting said bolster, and links journaled in said'bearin s and having their endent'portionspivota y connected to said ail at a point in the, transverse vertical plane mediate said bearings. I

8. In a car-truck, the combination with the, side framesq'having bolster {openings therein, and transoms connec tin the same at points mediate said opening an their ends extending toward t e journal-boxes and re movably securedto said frames, of. a bolster and means depen which have lateral rojections at their ends,

the ends of which ass. through-said opening, ding from said side frames for suspending said bolster;

9. In a car-truck, theconibination with" the side. frames having bolster-openin 51 therein, and trahsoms connecting said si e frames at pointsmediate the center of length thereof and the journal-boxes ofthe' same,- said trans'oms havin provided with latera lugs and are extended through suitable bearings in said side frame,

said transoms being also provided with, lateral projections extending toward the jour nal-boxes, and secured to the upper-arch of said side frames to prevent the withdrawal of I said trunnions, of a bolster the ends'of which pass through said bolster-opening, and means depending-from said side framesfor suspendin'g said bolster. a

' 10. In a car-truck, the .combination with side frameshaving bolstei'eopem'ngs therein, of-a spring-platform havin therefrom which is suspen ed said bolster-opening, springs-supported by said platform on either side of-said side frames, a

of a suspended s end trunnions that are :above said a ball arising 12. In a car-truck, the combination side frames having bolster-openin s therein,

ring-platform, evices' for sustainin .said p atform having three pivotcenters t e axes of which are all located above said latform, two of which are inconnectionyvit said sideframes and one with said platform, and platform. a a

13. In a car-truck, the combination with side frames having 'bolster-openin of a .suspendeds sus ini said platform, two of which are infcon a bolster supported-by said:-

1 5 S t e n," ring platform, devices for 'said p atfonmhavingthree pivot?" f cente'rls .r -,t eaxesof which are all located bo nection with saidrside frames 'andone withsaid platform, springs supported by said-plate form, and a bolster supported by said sprlngs;

14L In abar-truck, the combination with side frames having bolster-openin therein,

of a suspended =s ring-platform, evices for sustaining said p atfofm having three pivotcenters the axes of which are all locatednection wit platform, two of which are neon--- said side frames and one with" said latform, s rin s su orted b I said P P g PP y platform on either si e of said side frames,

' and a bolster supported by said springs. r In testimony whereof I have, hereunto set my hand this 9th day of March, A. D. '1904,

-WILLIAM r. BETTENDOR Ff Witnesses: a E. LU'NDY,

FRANK D. TnoMAson. 4 

